Same float for the same buttons.

I'm making an idle game, for each upgrade button I am using the same floats, not creating another Script file or I'd have millions of them.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class UpgradeEpherumDrillers : MonoBehaviour {
 
     public GatherButton g;
 
     public UnityEngine.UI.Text UpgradeNameText;
     public UnityEngine.UI.Text UpgradeAmountText;
     public UnityEngine.UI.Text UpgradeInfoText;
 
     public UnityEngine.UI.Slider TimerSlider;
     public GameObject SliderToDisable;
 
     [Header("Drill Properties")]
     public string DrillerName = "";
     public float UpgradeCost = 500;
     public float UpgradeEpherumPerSecBy = 0;
     public float LevelNeededToUnlock = 0;
 
     [HideInInspector]
     public float EpherumPerSec = 0;
     [HideInInspector]
     public float UpgradeAmount = 0;
 
     [Space]
 
     [Header("Timer")]
     public float AutoTimerReset = 0;
     public float AutoTimer = 0;
 
     void Start(){
         UpgradeCost = PlayerPrefs.GetFloat ("UpgradeUpgradeCost", UpgradeCost);
         UpgradeEpherumPerSecBy = PlayerPrefs.GetFloat ("UpgradeUpgradeEpherumPerSecBy", UpgradeEpherumPerSecBy);
         LevelNeededToUnlock = PlayerPrefs.GetFloat ("UpgradeLevelNeededToUnlock", LevelNeededToUnlock);
         EpherumPerSec = PlayerPrefs.GetFloat ("UpgradeEpherumPerSec", EpherumPerSec);
         UpgradeAmount = PlayerPrefs.GetFloat ("UpgradeUpgradeAmount", UpgradeAmount);
         AutoTimerReset = PlayerPrefs.GetFloat ("UpgradeAutoTimerReset", AutoTimerReset);
         AutoTimer = PlayerPrefs.GetFloat ("UpgradeAutoTimer", AutoTimer);
     }
 
     void Update () {
         PlayerPrefs.SetFloat ("UpgradeUpgradeCost", UpgradeCost);
         PlayerPrefs.SetFloat ("UpgradeUpgradeEpherumPerSecBy", UpgradeEpherumPerSecBy);
         PlayerPrefs.SetFloat ("UpgradeLevelNeededToUnlock", LevelNeededToUnlock);
         PlayerPrefs.SetFloat ("UpgradeEpherumPerSec", EpherumPerSec);
         PlayerPrefs.SetFloat ("UpgradeUpgradeAmount", UpgradeAmount);
         PlayerPrefs.SetFloat ("UpgradeAutoTimerReset", AutoTimerReset);
         PlayerPrefs.SetFloat ("UpgradeAutoTimer", AutoTimer);
 
         if (LevelNeededToUnlock <= g.CurrentLevel) {
             UpgradeNameText.text = DrillerName;
             UpgradeAmountText.text = "Level " + UpgradeAmount + " " + "Cost " + UpgradeCost;
             UpgradeNameText.rectTransform.offsetMin = new Vector2 (UpgradeNameText.rectTransform.offsetMin.x, UpgradeNameText.rectTransform.offsetMin.x + 40);
             SliderToDisable.SetActive(true);
             UpgradeNameText.color = Color.white;
         } else if (LevelNeededToUnlock >= g.CurrentLevel) {
             UpgradeNameText.text = "Level Required " + LevelNeededToUnlock;
             UpgradeAmountText.text = "";
             UpgradeInfoText.text = "";
             UpgradeNameText.rectTransform.offsetMin = new Vector2 (UpgradeNameText.rectTransform.offsetMin.x, UpgradeNameText.rectTransform.offsetMin.x);
             SliderToDisable.SetActive(false);
         }
 
         if (LevelNeededToUnlock <= g.CurrentLevel) {
             if (UpgradeAmount == 0) {
                 UpgradeInfoText.text = "Not Bought";
             } else if (UpgradeAmount >= 0) {
                 UpgradeInfoText.text = "Epherum Per Second + " + UpgradeEpherumPerSecBy;
             }
         }
 
         if (UpgradeAmount == 0) {
             SliderToDisable.SetActive (false);
             AutoTimer = AutoTimerReset;
         } else if (UpgradeAmount >= 0) {
             SliderToDisable.SetActive (true);
         }
 
 
         TimerSlider.minValue = 0;
         TimerSlider.maxValue = AutoTimerReset;
         TimerSlider.value = AutoTimer;
         AutoTimer -= Time.deltaTime;
         if (UpgradeAmount >= 0) {
             if (AutoTimer <= 0) {
                 g.EpherumAmount += EpherumPerSec;
                 AutoTimer += AutoTimerReset;
             }
         }
     }
 
     public void UpgradeBought(){
         if (g.CurrentLevel >= LevelNeededToUnlock) {
             if (g.EpherumAmount >= UpgradeCost) {
                 UpgradeAmount += 1;
                 g.EpherumAmount -= UpgradeCost;
                 UpgradeCost += Mathf.Lerp (UpgradeCost, UpgradeCost, UpgradeCost);
                 g.EpherumPerSecondAmount += UpgradeEpherumPerSecBy;
                 EpherumPerSec += UpgradeEpherumPerSecBy;
             }
         }
     }
 
 }
 

When I try and save the floats with PlayerPrefs, when I load up the game all the buttons have the same cost, upgrade amount and the same epherumpersec.

How do I make it where they do not save for each button?

Example: I have a IronDrill and a CopperDrill, they both use the same floats and the same everything basically, just different prices and different epherumpersec. but when I save them they all have the same upgrade cost and the same epherumpersec. Thanks for the help :^]